Most definately keep the appointment,  you won't be wasting anyone's time.

Yes keep the appointment the staff at breast screening clinics will not think you have wasted their time. Its better to go get checked for peace of mind 

I recently took someone in exactly your situation to the same appointment. In her own case, the consultant explained that the tissue in and around the breast is 'nodular', (lumpy, bumpy and granular to touch), especially aged 20-30 years of age, pre-children and 7-10 days before the monthly cycle begins.

The lady I chaperoned was a bit embarrassed because the lump had almost completely gone, but she was quickly and emphatically reassured by the lovely staff that it's always better to be checked over, and to do the same again, should the situation present itself once more.

Thinking of you! God bless. 

Jan Xx

Thank you everyone I'll keep my appointment anyway xxx

Thank you everyone for this chat, my small lump has also nearly disappeared and I was umming and aaahing about whether to keep my appointment next week. I will definitely keep it now xx